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This article describes how to define filter chains in a timestamp service in Nexus Timestamp Server.
Each filter implements one step of the whole process of building the timestamp response. Filters are grouped into filter chains which are executed in sequence.
The primary advantage of the filter architecture is the flexible configuration it enables.
- A filter chain can be configured from existing filters.
- Custom functionality can be added by developing new filters.
The list of filters in the filter chain shall be executed in the order they appear in the configuration. If a filter is added to the chain it must be defined in the configuration.
Define filter chain
Order of filters
The order of the filters is important. To create a correct timestamp response, place the following filters in the end of the filter chain and in this order:
The only exception is when the timestamps should be stored in a an external database, then a StorageFilter must be the very last one (in the examples named